I have a couple of newbie type question with respect to devices like the squeezebox.

Does it need to have a PC up and actively streaming music to it or can it pull music from a network attached storage device? Based on what I saw on the slimdevices, website it would appear to be latter.

What advantage does a squeezebox have outside of size over a media-center type PC? Clearly the media center PC could also stream video (although I have no clue as to what type of transmission rate you would need to do this).